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Technical Thoughts on kill switches….

Discussion in 'Traditional Hot Rods' started by AGELE55, Sep 14, 2021.

  1. AGELE55
    Joined: Jan 4, 2018
    Posts: 398


    Now that the 55 is alive again, I’m thinking of installing a kill switch. I used to have a switch under the dash that would ground out the coil. Now I’m running an GM HEI.
    So… is a kill switch really worth the trouble? Whoever is gonna steal it would, I assume, know how to hot wire it. I’m thinking it would slow them down. I don’t think I’d be wanting to hang around troubleshooting a car I’m trying to steal. But hey, that’s just me.
  2. Jokester
    Joined: Jan 29, 2005
    Posts: 547


    Both of my hotrods have a battery kill switch. Shuts everything off.
    The crooks are after the easy ones. Make it difficult for them.

  3. Mr48chev
    Joined: Dec 28, 2007
    Posts: 30,197


    It would be easy enough to add a bit of wire and have an ignition kill switch in line in the wire to the HEI. All under the dash. Toggle switch or push/pull
    Summit has a batch of 50 amp toggle switches. The paddle is rather big and obvious though
    Summit Racing SUM-830881 Summit Racing® Toggle Switches | Summit Racing
    This push pull is a bit over doing it amp wise but you could hide it in plain sight and it could be and actual panic button kill switch along with helping hinder theft or unauthorized starting. Cambridge Push and Pull Switch, On and Off, 75 AMP, 12 Volt DC, 900 Watts : Automotive
    stillrunners and Driver50x like this.
  4. KJSR
    Joined: Mar 7, 2008
    Posts: 2,485

    from Utah
    1. Utah HAMBers

    Put a stick shift in it :)

  5. solidaxle
    Joined: Jan 6, 2011
    Posts: 571

    from Upstate,NY

    Easy to install and cheap. It's a no brainier.
    I install one my backhoe and excavator also. Everyone has a John Deere and Bobcat key.
  6. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 3,514

    Flathead Dave
    from So. Cal.

    Place a broom stick thru the wheels.
    Deuces likes this.
  7. Battery 'shut offs' are another option. It's a little more work to hide them but it's not a huge deal if you're creative.
    But they also are great safety as well as security. I've had more than one acquaintance who were working on the car..... or just got back from a run, went in the house, looked out the window a few minutes later, and saw their car in flames.
    Maybe both are even better?
    stillrunners and pprather like this.
  8. Rramjet1
    Joined: Mar 13, 2018
    Posts: 188


    We have a remote power shutoff in our 50 Chevy convertible. It has electric doors and the fan runs for quite a while after engine shutoff so not really an anti theft device because it’s easy to cut into a convertible. Think it came from Ron Francis.
  9. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,105

    from WA-OR, USA

    I know a guy that has a hidden key switch wired into the NSS circuit, a hidden battery disconnect and a wire cable attached under the hood, with a small loop that drops down between the radiator area to under the car and a crossmember, where it can be locked with a pad lock.
    He did all this after recovering his car from being stolen from his driveway.
    Last edited: Sep 14, 2021
  10. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 9,579

    Johnny Gee
    from Downey, Ca

    I have my own formula but I'm not sharing. That would be like saying "you'll find the key under the front door mat".@Agele55 I'll give this much info. If your Battery is still in the engine compartment #1 thing would be move it to the trunk. HEI's and even points ignition are to easy to clip a jumper wire from battery. Make them work to get it going. But, nothing much one can do against a flat bed carrier.
    Last edited: Sep 15, 2021
    clem, Just Gary, rpm56 and 5 others like this.
  11. 325w
    Joined: Feb 18, 2008
    Posts: 5,686


    I use one that cuts all power forward. Small easy to wire and works.
    stillrunners and Deuces like this.
  12. X-cpe
    Joined: Mar 9, 2018
    Posts: 1,308


    I was thinking about using an electric door lock popper to make a remotely operated cut off switch. Googled it. Late to the party, they already exist.
    Deuces likes this.
  13. Deuces
    Joined: Nov 3, 2009
    Posts: 21,627

    from Michigan

    I'm deleting my post....
  14. A67E410A-87CA-402D-9770-712B38684CA5.jpeg C24BC61A-81F1-4669-BCA1-6711652DAC38.jpeg

    sky jacks and heavy equipment have lock out kill switches
  15. okiedokie
    Joined: Jul 5, 2005
    Posts: 4,384

    from Ok

    Deuces and olscrounger like this.
  16. pirate
    Joined: Jun 29, 2006
    Posts: 690

    from Alabama

    Fairly cheap and easy to do to wire a battery cut off switch. I also run an electric fuel pump with a hidden toggle switch, even if they get it started they are not going far. Kind of like chicken soup when you have a cold or the flu. May not help but can’t hurt anything.

    I don’t know for sure but I’d bet most cars that are stolen are rolled into a trailer or on a roll back. A plastic coated cable with padlock run through the wheels or through a wheel and around the frame may be more effective.
    Deuces and gimpyshotrods like this.
  17. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,204


    Nobody knows how to hotwire anything anymore.
    reagen, loudbang, Cosmo49 and 5 others like this.
  18. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,204


    Nobody questions a flatbed picking up an old car.
    reagen, clem, egads and 7 others like this.
  19. I had a mate in high school whose OT car (VK SS Commodore for the Aussies) was a manual.
    He removed the gearstick boot and centre console and cut the gear stick off flush.
    Then he welded the female end of a 1/2" drive socket extension bar onto the stub. He welded the male end onto the gearstick. Then put the boot and console back together.
    When he parked the car he'd leave it in neutral, pull the stick out and take it with him. Can't steal it if you cant get it into gear.
    Worked a treat, although sometimes in a quick gearchange the stick would pop out. Not good in a race...
    clem, loudbang, Deuces and 2 others like this.
  20. twenty8
    Joined: Apr 8, 2021
    Posts: 641


    Distributor rotor or coil lead would have been a little easier...................:confused::confused::confused:
    Deuces likes this.
  21. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 5,670


    When I want to steal one of those with the locked handle, I just loosen that nut enough to be able to rotate the body of the switch.
    GordonC likes this.
  22. 1971BB427
    Joined: Mar 6, 2010
    Posts: 7,094

    from Oregon

    All my hotrods have hidden battery switches just for security reasons. I don't turn the battery off unless I'm away from home, or if it's in winter storage at home. It's just one of several security features I've added to my cars to make them a less attractive candidate to thieves.
    Deuces likes this.
  23. BamaMav
    Joined: Jun 19, 2011
    Posts: 5,202

    from Berry, AL

    I've always wondered about using a line lock in the brake circuit. Not sure how much amperage they pull, but if it wouldn't pull your battery down you could lock the brakes and it would take a pretty good winch to drag it in a trailer or rollback. Not saying it wouldn't happen, but thieves don't like the attention squealing tires make dragging one.
    loudbang and Deuces like this.
  24. Harv
    Joined: Jan 16, 2008
    Posts: 288

    from Sydney

    I know it's OT, but please, please tell me this was just a white or silver SS with an M21, and not a Blue Meanie.

  25. Dooley
    Joined: May 29, 2002
    Posts: 2,750

    from Buffalo NY

    What are the odds that they drive them away vs roll them into a trailer and split?
    If it rolls they can grab it and rewire if needed...
    48fordnut and irishsteve like this.
  26. Lil32
    Joined: Apr 4, 2012
    Posts: 2,366


    I have a battery switch
    Battery under dash
    also fuel switch
    and steering lock
    Deuces likes this.
  27. greenie-reddy
    Joined: Nov 23, 2009
    Posts: 817

    from maryland

    Well said. I accompanied my 28 year old son, ex-Navy submariner, to a new car dealership to look at a (very) OT Japanese roadster with a 6-speed manual. The 20 something salesman sheepishly hands me the keys and says there is no one on staff that can drive it’s car. I told him he’s lucky I came along because the potential buyer can’t drive it either! The sun didn’t have a clutch either.
    So I had a great time test driving a car with a 8500 rpm redline and 2 seats.
    Of course, after I drove it home I had to teach the LT. how to drive the thing. Priceless.

  28. DB8DBDCB-83DF-4B7E-A9CA-F0F0ECC38904.gif

    What if instead of cutting power to your car, you make something like this.
    Easy to spot thrives if they are walking funny and have silent farts :D
  29. MeanGene427
    Joined: Dec 15, 2010
    Posts: 1,963

    from Napa

    Those are OK, but the original Caterpillar Master Switches are extremely HD, and have a removable key
    VANDENPLAS likes this.
  30. Blues4U
    Joined: Oct 1, 2015
    Posts: 6,109

    from So Cal

    Keep in mind that any kind of kill switch you add to the system adds a potential failure point, increasing the possibility of leaving you stranded somewhere.
    rpm56, X-cpe, 57JoeFoMoPar and 3 others like this.

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